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This exercise will help you identify the cultural characteristics of a bacterium on an agar plate - called colony morphology. Although one might not necessarily see the importance of colonial morphology at first, it really can be important when identifying the bacterium.
Colony morphology can sometimes be useful in bacterial identification. Colonies are described based on size, shape, texture, elevation, pigmentation, and effect on growth medium. Find common criteria that are used to characterize bacterial growth; Colony shape. Size of the bacterial colony. Appearance of the colony surface. Consistency/Texture.
On agar plates, bacteria grow in collections of cells called colonies. Each colony arises from a single bacterium or a few bacteria (CFU). Although individual cells are too small to be viewed with the unaided eye, masses of cells can be observed. Colonies can have different forms, margins, elevations and colors.
In microbiology, colonial morphology refers to the visual appearance of bacterial or fungal colonies on an agar plate. Examining colonial morphology is the first step in the identification of an unknown microbe.
Colony morphology. A swab from a bin spread directly onto nutrient agar. Colonies differ in their shape, size, colour and texture. Can you count how many different colony types there are? Use the diagrams on colony morphology to help you interpret your plate. A cough that was aimed directly onto nutrient agar.
Differentiate between colony morphology and cell morphology, and describe the colony morphology of bacteria grown on a solid surface; Prepare a bacterial smear for staining; Perform a simple stain, and explain why they are useful; Visualize individual bacterial cells using oil immersion microscopy and describe their cell morphology
Describing Colony Morphology. As we document our discoveries it is absolutely essential that we use common adjectives to describe the physical characteristics of the colonies that our isolates form when cultivated on an agar surface. Below is an illustrated guide to the terms we will use. 1. Culture conditions.
Determining the morphology of a single colony growing on the surface of a plate culture can be an important tool in the description and identification of microorganisms.
Nov 19, 2011 · Gross morphology includes colony shape, size, and surface features (Fig. 2.1). For example, Bacillus atropheu s strain globigii produces an orange-pigmented colony on tryptic soy agar but produces small white colonies on other media.
Determining the morphology of a single colony growing on the surface of a plate culture can be an important tool in the description and identification of microorganisms.
